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Calculated motor specs/recommendations
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xcntrk
RC-Monster Carbon Fiber
 
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Posts: 171
Join Date: Mar 2008
Location: Virginia
Calculated motor specs/recommendations - 03.09.2008, 10:45 AM

Hey all, I’m new to the electric side of the house. I have a (noisy) nitro supermaxx that I’m in the process of converting over to BL. I’ve been hashing out various motor setups for days using the RC calc and think I found a nice setup for my rig. How do these values below look? It’s essentially a pair of 2s (s-14.8) with a Neu 1515/1.5D. Plan to use a Quark 125 w/external BEC.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1.7222222222222223
Other Ratio: 1
Spur Tooth Count: 51
Pinion Tooth Count: 20
Total Voltage: 14.8
Motor KV: 2700
Tire Diameter (inches): 5.75
Tire Ballooning (inches): .1
Motor Current Draw: 120
Motor coil Ω: 0.004
Spur/Pinion Ratio: 2.55 : 1
Total Ratio: 14.52628 : 1
Tire Circumference (inches): 18.69 inches (474.79 mm)
Total Motor Speed: 38664 RPM
Vehicle Speed: 47.11 mph (75.68 km/h)
Effective Speed Rate: 3.18 mph/V (5.11 kmh/V)
Estimated Adjusted Speed: 44 mph (71 km/h) - 6% loss
Effective KV Value: 2612.43
Motor Torque: 0.31 ft-lbs
Final Torque: 4.55 ft-lbs
Final Power: 1776 watts (2.4 HP)

All comments appreciate..
   
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